30-06 for coyote and fox, ya, that ought to kill em. But really, even a FMJ will totally destroy a critter, if hit at an angle the involves, shoulders and hips, I know that most of these boys on the board kill theirs broadside, but of the six coyotes and one cat I took this weekend, only two yotes were broadside, two were head on, one quartering in, and one, well lets just say the game was up and he was leaving. The cat was sitting head on, one to the chest, with a 52gr HP out of 223, bingo instant field dress. Small cat though, about 14 lbs, before the shot. I am not a reloader, so go with what the boys on the board says work for them, but understand that all loads will at one time or another do alot of damage, however my 17Rem, doesn't seem to hurt much fur, but it doesn't kill to good at 250 to 300 yards either, pick your shots.